An atmospheric pattern has formed that allows thunderstorms to reform over the same area and produce rainfall rates above 2.00” per hour; rainfall rates exceeding 3.00” per hour have been reported between Des Moines and Ames, with Flash Flood warnings from Carroll through northern Polk and southern Story counties. The area of the heaviest rainfall is currently moving east, along I-80. With these heavy downpours, driving can be hazardous with low visibility. The current modeling has the potential for additional areas of persistent thunderstorms to form in eastern Iowa.
Additional showers and thunderstorms are expected in two waves tomorrow, including the potential for stronger to severe thunderstorms in the late afternoon/evening time frame. Soaked top soil profiles and higher streamflows will increase the potential for flash flooding. Never drive through standing water on roadways. Please stay up-to-date via the NWS and local media. Attached is a Situation Report outlining rainfall totals and severe potential.
Additional showers and thunderstorms are expected in two waves tomorrow, including the potential for stronger to severe thunderstorms in the late afternoon/evening time frame. Soaked top soil profiles and higher streamflows will increase the potential for flash flooding. Never drive through standing water on roadways. Please stay up-to-date via the NWS and local media. Attached is a Situation Report outlining rainfall totals and severe potential.